I know that ISO files follow ISO-9660, the ISO in which stands for International Standards Organisation, but a lot of file formats will presumably follow some ISO standard, so that seems incorrect. My best guess so far is: Image Standard Optical.
Respondent The respondent is the party against whom a petition is filed, especially one on appeal. The respondent can be either the plaintiff or the defendant from the court below, as either party can appeal the decision thereby making themselves the petitioner and their adversary the respondent. Formerly, in the equity courts of common law, the defendant was always called the respondent. see also petitioner.
The next four variables identify the parties to the case. Petitioner refers to the party who petitioned the Supreme Court to review the case. This party is variously known as the petitioner or the appellant. Respondent refers to the party being sued or tried and is also known as the appellee.